Jelet is the exam for diploma student’s who wants to do further studies btech after diploma. JELET exam for 2021 would be more competitive so concentrate and give more focus in E.TECH because it will carry lost of marks in the jelet exam, so we suggest you to get trips and tricks from that institution. and exam is on your door ,they have announced the month but didn’t mentioned about the date ,the reason is pandemic. But the board of council announced that it will held in the last week of august.
TECH-STUDY INSTITUTION PREPARATION FOR JELETE-2021
In this article we are discussing about the ETech and in the last we have quiz for you guys related to the topic. and in the next article we will come up with the many other subject and many other topic related to your jelet exam 2021.
Active & Passive Elements:
If any elements absorb, dissipate, waste, convert electrical energy it is called as passive element. Example… Resistor, Inductor, Capacitor.
If any elements energize, deliver, give out, drive the electrical energy it is called as active element. Example. BJT, MOSFET.
Node : It is a point of interconnection or junction between two or more components.
Branch : It is an elemental connection between two nodes.
Mesh: A mesh is a close path which should not have any further closed path in it.
Loop : All possible close path.
At constant temperature and for uniform cross section of conductor. V=IR,
Short circuit & open circuit
Voltage across terminals of a short circuit is always zero, regardless of the value of current which could be any value. (R = 0)
The current through an open circuit is always zero, regardless of voltage across the terminals which could be any value. ( R =∞)
Kirchhoff’s current law(KCL):
It states that any instant the algebraic sum of current leaving any junction (or node) in a network is zero.
In other words, current entering a node is equal to current leaving the node.
∑ Iin=∑ Iout I1+I2=I3+I4
Kirchoff’s voltage law (KVL):
It states that any instant the algebraic sum of the voltage around any closed path (or loop) within a network is zero. In other words, the sum of voltage drops is equal to sum of voltage rises.
Here we collect some quiz for that institution and it will help you to grow your knowledge in E.TECH
#1. What current must flow if 0.24 coulombs is to be transferred in 15ms ?
#2. If a current of 10A flows for four minutes, find the quantity of electricity transferred.
#3. The current flowing through a resistor is 0.8 A when a p.d of 20V is applied. Determine the value of the resistance.
#4. Determine the p.d. which must be applied to a 2k resistor in order that a current of 10mA may flow.
#5. A coil has a current of 50mA flowing through it when the applied voltage is 12V. What is the resistance of the coil?
#6. A 100V battery is connected across a resistor and causes a current of 5mA to flow. Determine the resistance of the resistor. If the voltage is now reduced to 25V, what will be the new value of the current flowing?
#7. A 100W electric light bulb is connected to a 250V supply. Determine (a) the current flowing in the bulb, and (b) the resistance of the bulb
#8. Calculate the power dissipated when a current of 4mA flows through a resistance of 5kohm
#9. An electric kettle has a resistance of 30ohm. What current will flow when it is connected to a 240V supply? Find also the power rating of the kettle.
#10. A current of 5A flows in the winding of an electric motor, the resistance of the winding being 100ohm . Determine (a) the p.d. across the winding, and (b) the power dissipated by the coil.
#11. The hot resistance of a 240V filament lamp is 960_. Find the current taken by the lamp and its power rating.
#12. An electric heater consumes 3.6 MJ when connected to a 250Vsupply for 40 minutes. Find the power rating of the heater and the current taken from the supply.
#13. Determine the power dissipated by the element of an electric fire of resistance 20_ when a current of 10A flows through it. If the fire is on for 6 hours determine the energy used and the cost if 1 unit of electricity costs Rs-3.00.
#14. The resistance of a 5m length of wire is 600ohm. Determine (a) the resistance of an 8m length of the same wire, and (b) the length of the same wire when the resistance is 420ohm.
#15. A piece of wire of cross-sectional area 2mm^2 has a resistance of 300ohm. Find (a) the resistance of a wire of the same length and material if the cross sectional area is 5mm^2, (b) the cross-sectional area of a wire of the same length and material of resistance 750ohm.
#16. Calculate the cross-sectional area, in mm2, of a piece of copper wire, 40m in length and having a resistance of 0.25ohm. Take the resistivity of copper as 0.02×10−6 ohm-m.
#17. Calculate the resistance of a 2 km length of aluminium overhead power cable if the cross-sectional area of the cable is 100mm2. Take the resistivity of aluminium to be 0.03×10−6 ohm - m.
#18. Determine the resistance of 1200m of copper cable having a diameter of 12mm if the resistivity of copper is 1.7×10−8 ohm-m.
#19. A coil of copper wire has a resistance of 100ohm when its temperature is 0◦C. Determine its resistance at 70◦C if the temperature coefficient of resistance of copper at 0◦C is 0.0043/◦C.
#20. An aluminium cable has a resistance of 27 ohm at a temperature of 35◦C. Determine its resistance at 0◦C. Take the temperature coefficient of resistance at 0◦C to be 0.0038/◦C.
comment below how many scored you have for etceh.
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